Envirologic Technologies has developed an approach to pre-screen individual sites prior to initiating underground storage tank removal or investigative activities. The PREP allows for an informed decision making process throughout the course of tank removal activities and subsequent site characterization in an effort to lead to timely, cost effective closure of an individual site.

The PREP is designed to provide for the effective application of the Risk Based Corrective Action (RBCA) process, and allows owners and operators to take full advantage of the benefits that can potentially be realized through RBCA. Additionally, the recently released ASTM standard PS 3-95 ("Guide for Accelerated Site Characterization for Confirmed or Suspected Petroleum Releases") has been developed as a guidance document that describes processes to follow in order to rapidly and accurately characterize a site in an effort to make informed corrective action decisions in a swift, cost effective manner. The PREP provides the necessary data elements required to implement an Accelerated Site Characterization program.

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What is the PREP?

The PREP is a method that establishes all reasonably potential exposure scenarios to human or environmental receptors in the event that a release is discovered. In order to make the evaluation, some of the elements of the PREP include establishing area land use, area water supply use (municipal and domestic), mapping utility corridors, and development of a conceptual geologic and hydrogeologic framework for a facility.

One of the primary purposes of the PREP is to assess the stringency of screening levels that are likely to be applied at a given site. Additionally conceptual corrective action options relevant for site conditions and potential exposure scenarios are also identified (e.g. passive remediation, active remediation, and/or application of institutional controls).

The PREP results essentially provides a "road map" on how best to proceed with underground storage tank release response and remedial activities.

How Can I Benefit from the PREP?

• Having a response plan in place prior to site upgrade will reduce down time at an individual site. The elements of the PREP can be likened to a set of site building and design plans.
• You will know ahead of time approximate levels of contaminants that can be potentially left in place.
• Realistic budgets related to environmental concerns can be established based on the PREP results.
• Eliminate the "Reactionary Approach" usually followed after confirmation of a release by knowing site conditions and preferred response actions beforehand.
• Costs associated with environmental issues are high, a planned approach to response activities improves ways that monies are spent (i.e. your dollar goes further).
• The PREP is a methodology that allows for effective implementation of the RBCA process, and can thereby improve success for a more timely site closure.
• The RBCA process has some limitations, the PREP identifies the deficiencies and allows you to aggressively challenge them.
• The PREP guards against misapplication of the RBCA process, thereby limiting regulatory scrutiny and re-evaluation of potential exposure scenarios.

For additional information please contact: Envirologic Technologies, Inc.

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